Answered

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The radius, r, of the circle below is 7 cm.
Calculate the area of the circle.
Give your answer to 1 d.p.
7 cm
area=лr²

Sagot :

KitdaAneek

Answer:

153.9 cm²

Step-by-step explanation:

Use the area of a circle formula to solve this question. Plug in the known value of the radius (7 cm) and use 3.1415 for the constant π(pi) in the equation.

[tex]\hrulefill[/tex]

[tex]\text{Area} = \pi r^2\text{~(plug in 7 for r)}\\\\\text{Area} = \pi (7)^2\\\\7^2 = 49\\\\\text{Area} = \pi \times 49\\\\\pi \approx 3.1415\\\\\text{Area} \approx 3.14153 \times 49\\\\\text{Area} \approx 153.9 \, \text{cm}^2\\\\= \boxed{153.9 \, \text{cm}^2}[/tex]

Therefore, the area of the circle is 153.9 cm².

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